Lets Talk Blow Off Valves

[skylinesx]

well I've been searching for a blow off valve and to be honest I have no idea what exactly I want, I know i'm looking for a nice high pitched squeel when the valve releases, however I want something that will perform good, and I'm looking for a reasonably priced one, any suggestions??

[jershelb]

I know some of you goobers on here have some experience with this. Bump.

[warwagon]

the tial 50mm is a very nice piece

[jono]

id go with a tial too. not the cheapest but they are very good.

[b00st]

well I've been searching for a blow off valve and to be honest I have no idea what exactly I want, I know i'm looking for a nice high pitched squeel when the valve releases, however I want something that will perform good, and I'm looking for a reasonably priced one, any suggestions??

i run a turbo xs bov cause i have the recirculate into the intake for MAF reasons...i still run atmosphere, but im going with a TiAL after i get a maft, honestly i gave more for my turbo xs bov then what a TiAL costs

[b18apwr]

I had a Greddy Type S that I really liked. It had the ability to be plumbed back in to the intake air pre-turbo or vented to open air.

[seth_06]

if you want a loud bov get a turbo xs rfl, thats the next thing on my list. They sound really good.

[b18ccivics]

turbo xs rfl is junk do not get it, tial is very good that is what i recomend and what i run it sounds like a whip cracking. but for the sound you are describing get the hks super sequential, it is a loud pitched chirp and you can buy different reeds to change the sound. if you run maf then get the big boy greddy, i forgot the name of it but it is very good also.

[13g-crx]

I had a Greddy Type S that I really liked. It had the ability to be plumbed back in to the intake air pre-turbo or vented to open air.

I also have the Greddy Type S. I like the way it sounds and the fact that you can adjust it to relieve at different pressures.

[b00st]

mine is not the rfl, but it holds boost good, but like i said im going with a tial after i upgrade my intercooler

[b18apwr]

if you run maf then get the big boy greddy, i forgot the name of it but it is very good also.


The big boy he speaks of is the Greddy Type R BOV.

[skylinesx]

well te loud high pitched churp is what i'm going for, i feel stupid but I've honestly never heard of a Tial bov, where can i check one of those out at, and what do they sound like when the go off?

[seth_06]

turbo xs rfl is junk do not get it, tial is very good that is what i recomend and what i run it sounds like a whip cracking. but for the sound you are describing get the hks super sequential, it is a loud pitched chirp and you can buy different reeds to change the sound. if you run maf then get the big boy greddy, i forgot the name of it but it is very good also.

I know quite a few guys running turbo xs bov's and they only have good things to say about it.

[skylinesx]

Oh yeah and I'm kinda new when it comes to turbos, beings I've only had my turbo car for a while, so this is probably a stupid question but do I have to upgrade my wastegate when i upgrade the turbo, and if so what kind of wastegate do you all recomend, I've heard of a fluttering wastegate that gives the blow off valve a specific sputtering noise when it releases kind of like a psh..psh..psh or something like that

[boosted01]

depends on if your upgraded turbo is internal or externally wastegated, if its externally you have to have a manifold with a wastegate flange, if its internal the wastegate is on the turbo and you dont have to worry about it.
the hks ssqv is a great bov in my opinion and tial wastegates are pretty ....ing phenomenal as are their blow off valves

[b00st]

like he said, depends on your setup majority of turbos have internal acuators, altho external gates will hold boost better, 99% of hks products is pretty expensive..

[jershelb]

My vote goes with the Tial if your wanting that high pitched squeel. The best bang for the buck LOUD bov is the Turbo XS RFL. The Greddy type S is also a mellinium hustler, no doubt. HKS SSQ is the lord of them all, but has the price tag to match. I don't think you will need to change wastegates to upgrade the bov, but check with Holland to be safe. Start a poll to see who votes for what.

[DRFT250]

No you don't need to change wastegates if you're changing bov's....

I assume you're still running the stock turbo so you won't even mess with the wastegate...

Also, since you're still running the stock turbo and probably don't have a boost controller, there is no point in upgrading the BOV... unless like you were saying earlier, you want it simply for the "sound factor"
The stock BOV will hold up better than most of the brands out there.

Oh yeah... and you are aware that you'll need a BOV that can be recirculated... venting to atmosphere with an rb is a no-no unless you've got a blow-thru MAF or a MAP, and this is where it kills the "chirp" sound... my suggestion if you really want to hear the BOV is get a POD filter

[b00st]

my stock 2g dsm bov was junk, would'nt hold stock boost (14.5psi) after full spool, i was running 9.40's, changed the bov, turn the boost up to 17psi, ran 50/50 110oct mix, and drop down to 8.60ies......and ending up wearing my stock clutch out :\

[skylinesx]

No you don't need to change wastegates if you're changing bov's....

I assume you're still running the stock turbo so you won't even mess with the wastegate...

Also, since you're still running the stock turbo and probably don't have a boost controller, there is no point in upgrading the BOV... unless like you were saying earlier, you want it simply for the "sound factor"
The stock BOV will hold up better than most of the brands out there.

Oh yeah... and you are aware that you'll need a BOV that can be recirculated... venting to atmosphere with an rb is a no-no unless you've got a blow-thru MAF or a MAP, and this is where it kills the "chirp" sound... my suggestion if you really want to hear the BOV is get a POD filter

Thats correct i'm using the stock turbo, but i mainly want a bov for the sound factor and am already using a pod filter, but when it comes to BOV's with the ability to be recirculated what brands come to mind, I know someone mentioned turbo xs made one that recirculated but who else does that will give nice chirp sound? btw i'm planning on running a greddy intake manifold, 90mm throttle body, and FMI setup, however i've had a hard time sourcing a greddy intake manifold, sorry off subject but i have got to find one and i'm having a hard time, so DRFT250 any ideas?

[94MRej1]

whatever you do, don't get a blitz super sound BOV. I had one on my old del sol.. It sounds like a loud sneezing sound.. I hated it.. lol

HKS SSQ BOV does squeel like crap, but the Greddy Type S has a pretty sweet sound as well....

[b00st]

what kind of budget are you on?

[whoflungpoo]

my stock 2g dsm bov was junk, would'nt hold stock boost (14.5psi) after full spool, i was running 9.40's, changed the bov, turn the boost up to 17psi, ran 50/50 110oct mix, and drop down to 8.60ies......and ending up wearing my stock clutch out :\


that's why you see a bunch of 2g owners going with a crushed 1G setup.

btw, IIRC, HKS's are pretty much the best on the market, as they supposedly will NOT leak as they have some sort of dual acuation.

if you don't like the sound, i'm pretty sure you can change it too.

[E-brakeMACHINE]

the sound is nice. im not exactly sure what my SR has on it, but it looks identical to a tial. it is nice and loud. that psh psh psh you were talkign about earlier, most of the time i hear that is just when im barely reaching any boost. but if you run an open atmospher bov without the power and air/fuel ratio to really need it, its gonna cause you to run a little rich. i do now. been thinking about switching back to stock.

[boosted01]

this thread is proof that ricers exist at all levels of import car ownership

[b00st]

that's why you see a bunch of 2g owners going with a crushed 1G setup.


ya but then you have to change your upper ic piping, so i just bought a aftermarket bov

[b18ccivics]

the rfl will come loose and acutally blow off i have seen a few dsm's have dents in the hood from the inside where the valve came off under boost and hit the hood. They use an o-ring and a few set screws to hold it on and it is just a bad design. Then you have to adjust it with what they call shims but are washers then hope it dont come apart again. This is just my experence with them do what you want/like. I have used a tial bov on maf cars (sr20s) with no trouble you just have to get the right spring. Yeah it would go rich for a split second after a shift but if you run a dedicated vac. line to it they work fast enough that i really havent had a problem. then later you can get rid of the maf and put speed density (map sensor) and not have a to worry about it.

[b00st]

the rfl will come loose and acutally blow off i have seen a few dsm's have dents in the hood from the inside where the valve came off under boost and hit the hood. They use an o-ring and a few set screws to hold it on and it is just a bad design. Then you have to adjust it with what they call shims but are washers then hope it dont come apart again.

i agree, the design is poor, i run a turbo xs, ive encounter minor boost leaks from the oring and set screw design, just have to check em every once in a while, but it holds boost fine other then that, im going to upgrade to tial once i upgrade to fmic, also a tial external gate. all i can say is might have to spend the extra money to avoid a extra head ache.

[b18ccivics]

you get what you pay for, build it right build it once. buy cheap crap then you have to buy good crap to replace it. just save and buy the good crap first and spend less money.

[b00st]

turbo xs bov aint that cheap, good bov, just poor design

[skylinesx]

well my budget isn't really an issue, i mean i want to get a good quality blow off valve with a loud squeel when it releases and I also want it to work well with my car, therefore if I vent directly to the atmosphere, how bad will running a little rich hurt me in the long run, or should i just find a bov that will recirculate, or vent directly to the atmosphere, and replace the maf with a speed density sensor like b18ccivics said?

[b00st]

run a maft, it will compensate for the unrecirculated air, so it wont run as rich, and also show the ecu better airflow, plus you can vent atmosphere

[whoflungpoo]

either that, or you can run the decel air correction on a AFC, it should compensate a bit for it.

[skylinesx]

Sorry I'm not real good with abbreviations and such lol. what exactly is the MAFT...assuming is has to do with the mass air flow sensor, also what exactly is the decel air correction on a AFC, and where do i find these things the MAFT and the decel air correction on a AFC, but which of those two things would be the best or easier to do to my car.

[boosted01]

AFC = apexi air fuel correction computer, you'll probably want one if you want to tune your car

[skylinesx]

oh ok, well where do you recomend me sourcing one of those from, and how much do they run?

[boosted01]

300 bucks ish
http://www.apexi-usa.com/product_electronics_detail.asp?id=202&pageNum=1

[boosted01]

if i were to own an rb25det i would make myself extremely familiar with APEX'i products, especially the SAFC and the AVC-R

[skylinesx]

I just checked that link out and that thing looks pretty bad ..., I believe I could you that to also correct an idle issue I have, so for 300 or so bucks i could kill two birds with one stone I suppose, then It would also allow me to purchase w/e blow off valve i wanted being's most of them vent to the atmosphere, as of now I believe I am going to go with a Tial bov. provided i purchase the AFC

[skylinesx]

Check this out and tell me if you think its worth bidding on??? only have two days left so if I need opinions fast lol....

http://cgi.ebay.com/ebaymotors/Tial-50mm-Blow-Off-Valve-BOV-Honda-Acura-VW_W0QQitemZ8073408756QQihZ019QQcategoryZ33742QQss PageNameZWDVWQQrdZ1QQcmdZViewItem

[E-brakeMACHINE]

i thought about getting the apexi safc II for my SR, but on the other forums i havent really heard that much good about them. everybody is suggesting the apexi power FC. can adjust a lot more with it. only problem is its about 700 or so.

[b00st]

reserve is not met on that item, if you want it id buy it now having 7 bids on it.... 180 aint bad for a tial.... i get some of my stuff from this fella http://stores.ebay.com/Import-Blowout-Sales his shipping is extremly fast

[skylinesx]

Hey i checked out that guys store and it looks like he has a very extensive selection of stuff now do you think i should get the 7 psi spring or the one with the 11 psi spring??

[b00st]

thats up 2 you, the link you posted has a 11psi spring...you can always tune it with a boost controler

[skylinesx]

as of right now I do not have a boost controller, but I am searching for one, but i need to get something straight does the 11psi spring rating mean i can only push 11lbs boost with that spring in the bov?

[b00st]

its for higher boost levels, you can get a mbc off the internet, i think i got 2 that i used to use, one is a grainger valve, the other is one that was in a parts car i bought, that i never used, ill give you one

[boosted01]

but you have to have a boost guage and start tuning the MBC from very low levels or you could overboost and blow .... up

[b00st]

ya, you will need a boost guage also

[skylinesx]

I know, an dammit i just now got around to readin the thread, i wish i woulda seen that u had a MBC that i coula had sooner, b/c i jus ordered one for like 20 bucks last night lol, but i'm bout to order an afc t/n and a tial bov

[b00st]

afc is good to have, but you probly wont need it, till you upgrade your injectors

[skylinesx]

yeah, man i just installed the MBC and i believe i did it the right way, i followed directions to a T and i'm not so sure its working, course i also dont have an aftermarket boost guage, so after a few ppl look at it and i get it hooked up for sure the right way, i think i may take it off till i get a diff boost guage, but i can feel the car pulling slightly harder, but i'm affraid i may turn the boost up too far without having an aftermarket boost guage to monitor it

[jershelb]

i think i may take it off till i get a diff boost guage, but i can feel the car pulling slightly harder, but i'm affraid i may turn the boost up too far without having an aftermarket boost guage to monitor it
Couldn't agree more. When does the SAFC get here? One of the last main things you need now is a wideband, or a way to read/log your a:f. Sounds like your well on your way to seeing some higher power in the near future! :D

[skylinesx]

well the SAFC should be here anytime now I ordered it late last week, My Tial bov came in last night, and my intercoolers been here for a while, so all i lack now is a bigger throttle body and I'm ready to either find a greddy intake manifold or have mine customized to fit my hood, theres a guy on www.racebread.com who custome made his own front mount throttle body setup by modifying his stock manifold, beings the greddy doesnt add any hp, if i can modify the stock one it will save alot of money and work just as well. still looking into it though, and what exactly does the wideband do, and where might i pick something up that will read/log my a:f?

[jershelb]

The wideband is an important tool in monitoring your A:F. There are several different makes and models, but a popular and reliable one is the Wideband Commander. For most widebands, you take your car to an exhaust shop and have a bung welded into your downpipe or anywhere BEFORE your stock cats location. Screw the wideband sensor into the new bung and run your wire into the cab of your car where it will connect to some type of interface device (laptop, gauge, etc...) When you start upping that boost, your really going to need to watch that air fuel VERY closely.

[skylinesx]

alright i'll def. look into that before i go to upping the boost, which it will be a while before i am looking at running some seriouse boost, for now i'm kinda staying moderate with the stock turbo, untill I have the money to upgrade turbo's, but i'll look into that wideband commander before I upgrade the turbo because I want to do my car the right way when it comes to upgrades, none of that slappin the .... on and lets see how it runs lol.

[spoolinquick]

Turbo XS RFL BOV end of story!

[b00st]

what all exactly you have? you might end up putting on a bunch of stuff you wont need just yet,, idk .... about 240's so im not sure, but afc's, wideband's and stuff like that gets expensive, when you can up the horsepower doing light mods, if your interested i might sell my boost guage, and narrowband A/F guage, $50 probly take both

[jershelb]

Turbo XS RFL BOV end of story!
They are real ....ing loud, but thats about all they have going for them...

A narrow band a:f will do fine, as long as you have something to monitor the a:f.

[SlowREX]

They are real ....ing loud, but thats about all they have going for them...

A narrow band a:f will do fine, as long as you have something to monitor the a:f.
thats the point my buddy has one on his green eclipse GST it is a realy loud bov, when we first put it in i was holding the hood open and he reved it up and it was so loud i backed off and slamed the hood!!! i could not hear myself say that i loved it :D :D :D :D :D

[skylinesx]

what all exactly you have? you might end up putting on a bunch of stuff you wont need just yet,, idk .... about 240's so im not sure, but afc's, wideband's and stuff like that gets expensive, when you can up the horsepower doing light mods, if your interested i might sell my boost guage, and narrowband A/F guage, $50 probly take both
well as of right now, I have the Apexi AFC on the way, Tial bov settin at the house, my FMI is here, and i'm in the process of finding a 90mm infinity q45 throttle body, and if your interested in selling the narrowband and the boost guage i might take a look at it, what brand boost guage/narrow band do you have?

[Supercow]

is this a budget project? If so you might check out the 1st generation dsm one. For 50 bucks or so you should be able to pick one up. Get a flange from road race and your set. Thats what I'm using and from what I've heard they hold up till about 16 psi.

[b00st]

well as of right now, I have the Apexi AFC on the way, Tial bov settin at the house, my FMI is here, and i'm in the process of finding a 90mm infinity q45 throttle body, and if your interested in selling the narrowband and the boost guage i might take a look at it, what brand boost guage/narrow band do you have?

they are faze guages...autozone special, not bad guages. i think im going to get autometer cause i dont want to mismatch guages, altho i like them cause they glow blue

[skylinesx]

is this a budget project? If so you might check out the 1st generation dsm one. For 50 bucks or so you should be able to pick one up. Get a flange from road race and your set. Thats what I'm using and from what I've heard they hold up till about 16 psi.

well those dsm bov's sounds pretty sweet, actually the sound I'm looking for, but i just recently purchased a Tial BOV. so I've already got my BOV and the throttle body is here, got here friday evening, so in the next couple weeks I should be running a little faster.